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Re: windows and file names > 256 bytes

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  Re: windows and file names > 256 bytes Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-06-25 12:06 +0100

#93134 — Re: windows and file names > 256 bytes

On 25/06/2015 09:00, Albert-Jan Roskam wrote:
> Hi,
>
> Consider the following calls, where very_long_path is more than 256 bytes:
> [1] os.mkdir(very_long_path)
> [2] os.getsize(very_long_path)
> [3] shutil.rmtree(very_long_path)
>
> I am using Python 2.7 and [1] and [2] fail under Windows XP [3] fails
> under Win7 (not sure about XP). It throws: “WindowsError: [Error 206] The
> filename or extension is too long” This is even when I use the "special"
> notations \\?\c:\dir\file or \\?\UNC\server\share\file, e.g.
> os.path.getsize("\\\\?\\" + "c:\\dir\\file")
> (Oddly, os.path.getsize(os.path.join("\\\\?", "c:\\dir\\file")) will
> truncate the prefix)
>
> My questions:
> 1. How can I get the file size of very long paths under XP?

Please see 
https://msdn.microsoft.com/en-gb/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath

> 2. Is this a bug in Python? I would prefer if Python dealt with the gory
> details of Windows' silly behavior.

I don't see why Python should work around any particular limitation of 
any given OS.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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